The best replacement for doom 3 is quake 4.

The best alternatives to doom 3 are rated as following:
★★★★★  quake 4
★★★★  half life 2
★★★  fear
★★★  dead space
★★  bfg edition
★★  bfg
★  doom 2
★  doom 3 resurrection of evil
★  far cry
★  doom 3 bfg
★  halo 2
  hl2
  fear 2
  resident evil 4
  area 51
  painkiller

Your alternative for doom 3 is not listed? Suggest!
Speaking about doom 3, one probably shouldn't forget about gamepad.

Other search terms related to doom 3 and their ratings are:
★★★★★ gamepad
★ joystick
★ joypad
You have in mind a companion for doom 3 and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of doom 3 in all years. Click on graph for more.
doom 3
quake 4
half life 2